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+/*
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+ * (C) Copyright 2004
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+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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+ *
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+ * See file CREDITS for list of people who contributed to this
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+ * project.
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License as
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+ * published by the Free Software Foundation; either version 2 of
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+ * the License, or (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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+ * MA 02111-1307 USA
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+ */
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+
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+#include <common.h>
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+
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+#ifdef CONFIG_NETCONSOLE
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+
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+#include <command.h>
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+#include <devices.h>
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+#include <net.h>
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+
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+#ifndef CONFIG_NET_MULTI
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+#error define CONFIG_NET_MULTI to use netconsole
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+#endif
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+
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+static uchar nc_buf = 0; /* input buffer */
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+static int input_recursion = 0;
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+static int output_recursion = 0;
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+static int net_timeout;
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+
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+static void nc_wait_arp_handler (uchar * pkt, unsigned dest, unsigned src,
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+ unsigned len)
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+{
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+ NetState = NETLOOP_SUCCESS; /* got arp reply - quit net loop */
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+}
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+
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+static void nc_handler (uchar * pkt, unsigned dest, unsigned src,
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+ unsigned len)
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+{
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+ if (nc_buf)
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+ NetState = NETLOOP_SUCCESS; /* got input - quit net loop */
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+}
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+
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+static void nc_timeout (void)
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+{
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+ NetState = NETLOOP_SUCCESS;
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+}
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+
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+void NcStart (void)
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+{
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+ if (memcmp (NetServerEther, NetEtherNullAddr, 6)) {
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+ /* going to check for input packet */
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+ NetSetHandler (nc_handler);
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+ NetSetTimeout (net_timeout, nc_timeout);
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+ } else {
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+ /* send arp request */
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+ NetSetHandler (nc_wait_arp_handler);
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+ NetSendUDPPacket (NetServerEther, NetServerIP, 6665, 6666, 0);
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+ }
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+}
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+
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+int nc_input_packet (uchar * pkt, unsigned dest, unsigned src, unsigned len)
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+{
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+ if (dest != 6666 || !len)
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+ return 0; /* not for us */
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+
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+ nc_buf = *pkt;
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+ return 1;
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+}
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+
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+static void nc_send_packet (const char *buf, int len)
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+{
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+ DECLARE_GLOBAL_DATA_PTR;
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+
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+ struct eth_device *eth;
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+ int inited = 0;
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+ uchar *pkt;
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+
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+ if (!memcmp (NetServerEther, NetEtherNullAddr, 6))
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+ return;
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+
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+ if ((eth = eth_get_dev ()) == NULL) {
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+ return;
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+ }
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+
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+ if (eth->state != ETH_STATE_ACTIVE) {
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+ if (eth_init (gd->bd) < 0)
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+ return;
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+ inited = 1;
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+ }
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+ pkt = (uchar *) NetTxPacket + NetEthHdrSize () + IP_HDR_SIZE;
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+ memcpy (pkt, buf, len);
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+ NetSendUDPPacket (NetServerEther, NetServerIP, 6666, 6665, len);
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+
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+ if (inited)
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+ eth_halt ();
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+}
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+
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+int nc_start (void)
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+{
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+ if (memcmp (NetServerEther, NetEtherNullAddr, 6))
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+ return 0;
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+
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+ return NetLoop (NETCONS); /* wait for arp reply */
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+}
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+
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+void nc_putc (char c)
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+{
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+ if (output_recursion)
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+ return;
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+ output_recursion = 1;
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+
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+ nc_send_packet (&c, 1);
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+
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+ output_recursion = 0;
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+}
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+
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+void nc_puts (const char *s)
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+{
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+ if (output_recursion)
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+ return;
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+ output_recursion = 1;
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+
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+ int len = strlen (s);
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+
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+ if (len > 512)
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+ len = 512;
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+
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+ nc_send_packet (s, len);
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+
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+ output_recursion = 0;
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+}
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+
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+int nc_getc (void)
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+{
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+ input_recursion = 1;
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+
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+ net_timeout = 0; /* no timeout */
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+ while (!nc_buf)
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+ NetLoop (NETCONS);
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+
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+ input_recursion = 0;
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+
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+ uchar tmp = nc_buf;
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+
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+ nc_buf = 0;
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+ return tmp;
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+}
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+
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+int nc_tstc (void)
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+{
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+ struct eth_device *eth;
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+
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+ if (input_recursion)
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+ return 0;
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+
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+ if (nc_buf)
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+ return 1;
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+
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+ eth = eth_get_dev ();
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+ if (eth && eth->state == ETH_STATE_ACTIVE)
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+ return 0; /* inside net loop */
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+
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+ input_recursion = 1;
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+
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+ net_timeout = 1;
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+ NetLoop (NETCONS); /* kind of poll */
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+
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+ input_recursion = 0;
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+
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+ return nc_buf != 0;
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+}
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+
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+int drv_nc_init (void)
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+{
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+ device_t dev;
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+ int rc;
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+
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+ memset (&dev, 0, sizeof (dev));
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+
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+ strcpy (dev.name, "nc");
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+ dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
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+ dev.start = nc_start;
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+ dev.putc = nc_putc;
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+ dev.puts = nc_puts;
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+ dev.getc = nc_getc;
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+ dev.tstc = nc_tstc;
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+
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+ rc = device_register (&dev);
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+
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+ return (rc == 0) ? 1 : rc;
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+}
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+
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+#endif /* CONFIG_NETCONSOLE */
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wdenk